make screenshot not so fucking big. goddamn.
Update README.md
tweaked alert2 demo to be less stupid
refactored SIAlertView "god class" into separate .h/.m files.
rename SIAlertItem --> SIAlertButton
removed SIAlertView items --> not necessary to keep track of "items" and "buttons".
made SIAlertButton a proper UIButton subclass.
some minor refactoring.
update README
Update README.md
updated version numbers
added support for more button types/colors or a custom color.
all drawn via CoreGraphics instead of using images.
updated demo project.
updated version numbers.
new screenshot
update README
new add button method to use custom color (forgot to do this in the previous commit! oops!)
bug fix for alert button action
Merge branch 'master' of https://github.com/jessesquires/SIAlertView

Signed-off-by: Levi Brown <levi@grokers.net>

Conflicts:
	README.md
	SIAlertView.podspec
	SIAlertView/SIAlertView.m
	SIAlertViewExample/SIAlertViewExample.xcodeproj/project.pbxproj
Changing pod spec to point at levigroker fork.

Signed-off-by: Levi Brown <levi@grokers.net>